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  <title>The CairoFillRule class</title>

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 <h1 class="title">The CairoFillRule class</h1>
 

 <div class="partintro"><p class="verinfo">(No version information available, might only be in Git)</p>


  <div class="section" id="cairofillrule.intro">
   <h2 class="title">简介</h2>
   <p class="para">
   A <strong class="classname">CairoFillRule</strong> is used to select how paths are filled. For both fill rules, whether or not a
   point is included in the fill is determined by taking a ray from that point to infinity and looking at intersections
   with the path. The ray can be in any direction, as long as it doesn&#039;t pass through the end point of a segment or have
   a tricky intersection such as intersecting tangent to the path. (Note that filling is not actually implemented in
   this way. This is just a description of the rule that is applied.)
   </p>
   <p class="para">
       The default fill rule is <strong><code>CairoFillRule::WINDING</code></strong>.
   </p>
  </div>


  <div class="section" id="cairofillrule.synopsis">
   <h2 class="title">类摘要</h2>


   <div class="classsynopsis">
    <div class="ooclass"></div>


    <div class="classsynopsisinfo">
     <span class="ooclass">
      <strong class="classname">CairoFillRule</strong>
     </span>
     {</div>

    <div class="classsynopsisinfo classsynopsisinfo_comment">/* 常量 */</div>
    <div class="fieldsynopsis">
     <span class="modifier">const</span>
     <span class="type">integer</span>
      <var class="fieldsynopsis_varname"><a href="class.cairofillrule.html#cairofillrule.constants.winding"><var class="varname">WINDING</var></a></var>
     <span class="initializer"> = 0</span>
    ;</div>

    <div class="fieldsynopsis">
     <span class="modifier">const</span>
     <span class="type">integer</span>
      <var class="fieldsynopsis_varname"><a href="class.cairofillrule.html#cairofillrule.constants.even-odd"><var class="varname">EVEN_ODD</var></a></var>
     <span class="initializer"> = 1</span>
    ;</div>

    
   }</div>


  </div>
  

  <div class="section" id="cairofillrule.constants">
   <h2 class="title">预定义常量</h2>
   <dl>


    
     <dt id="cairofillrule.constants.winding"><strong><code>CairoFillRule::WINDING</code></strong></dt>

     <dd>

      <p class="para">If the path crosses the ray from left-to-right, counts +1. If the path crosses the ray from right to left,
       counts -1. (Left and right are determined from the perspective of looking along the ray from the starting point.)
       If the total count is non-zero, the point will be filled.
      </p>
     </dd>

    

    
     <dt id="cairofillrule.constants.even-odd"><strong><code>CairoFillRule::EVEN_ODD</code></strong></dt>

     <dd>

      <p class="para">Counts the total number of intersections, without regard to the orientation of the contour.
      If the total number of intersections is odd, the point will be filled. </p>
     </dd>

    

   </dl>

  </div>



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